Velp Scientifica
– UDK139 Operating Manual
10004762/B5
43
5.1.2. Reserves and overfilling
Reserves
An automatic warning system notifies the operator of low reagent levels during
analysis. The external reagent tubes supplied with the unit are fitted with level
sensors. The
level sensors should be connected to the “Reserve” contact of the
corresponding inlet connection on the rear panel of the unit.
If the level of reagent in the tank falls below the minimum, when Start is pressed from
the “Analysis” or “Check-up” menu, the display shows one or more of the following
messages:
“AL6. Low H
2
O level
”
“AL7. Low NaOH level”
Top-up the tank in question with the relative reagent.
It is possible to start the work-cycle even with a reserve alert active by pressing
Continue.
NOTE
: Check reagent levels using the "Check-up" menu, the instrument will indicate
if any of the reagents are in reserve (see chapter 4.6.1).
IMPORTANT
Do not remove the reagent tubes with level sensors from the tanks as this cause a
partial emptying of the tubes. When a reagent is in reserve the tank should be
topped-up rather than replaced in order to avoid emptying the tubes.
I
f a tank is replaced, fill the tubes as described in “Check-up" (Chapter 4.6.1).
Overfilling
The unit is fitted with a dedicated hydraulic circuit for the removal of distillation
residues which are conveyed to a tank for disposal according to the regulations in
force in the place of installation.
The residues removal tube with level sensor should be connected to OUTLET
Distillation Residues on the rear of the unit and the electric contact of the level
sensor to the corr
esponding “Full” contact .
If the level of waste inside the tank exceeds the threshold defined by the level
sensor, when Start is pressed in the "Analysis" or "Check-up" menu, the display
shows
"AL9. Residues overflow”
.
Empty or replace the residues tank.
It is possible to start the work-cycle even with the overflow alert active by pressing
Continue.
NOTE
: Check the level of the overflow tank using the "Check-up" menu, the
instrument will report the overflow (see chapter 4.6.1).
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